[wp-trac] [WordPress Trac] #36746: WP v4.5.1 broke something in the Permalinks settings

[WordPress Trac]

#36746: WP v4.5.1 broke something in the Permalinks settings
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 Reporter:  voidPortal    |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Permalinks    |     Version:  4.5.1
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by voidPortal):

 The active theme is Songwriter (now 2.0.4), but this issue was happening
 with all themes I tried.

 And I am not specifically using a custom post type.

 If you were asking about the custom structure for my permalinks, if I
 tried to set the Permalinks to "Day and name" instead of "Plain" (which is
 the only one that still worked after upgrading to WordPress 4.5.1 and then
 4.5.2), the structure is the out-of-the-box:

 http://[domain]/%year%/%mothnum%/%day%/%postname%/

 I just fixed the problem by adding this to my .htaccess file:

 # BEGIN WordPress
 <IfModule mod_rewrite.c>
 RewriteEngine On
 RewriteBase /
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteCond %{REQUEST_FILENAME} !-d
 RewriteRule . /index.php [L]
 </IfModule>
 # END WordPress

 I never had to do that before upgrading to WordPress 4.5.1, however, so
 this is still puzzling to me.

 And I have another WordPress site where upgrading to 4.5.1 did NOT break
 the permalinks.

 The one where the permalinks did break has had posts posted every day
 since the beginning of this year and their category is identical. It is
 also a multisite WordPress, but then again so it my other site (a
 different multisite WP) where the permalinks never broke.

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Ticket URL: <https://core.trac.wordpress.org/ticket/36746#comment:7>
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